science

Vitelline veins

Vitelline veins is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Vitelline veins rather than just read about it. In short: The vitelline veins are veins that drain blood from the yolk sac and the gut tube during gestation. Path They run upward at first in front, and subsequently on either side of the intestinal canal.

Key takeaways

Vitelline veins belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Vitelline veins to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Vitelline veins from memory before moving on to harder problems.

Reference excerpt

The vitelline veins are veins that drain blood from the yolk sac and the gut tube during gestation.

Path They run upward at first in front, and subsequently on either side of the intestinal canal. They unite on the ventral aspect of the canal. Beyond this, they are connected to one another by two anastomotic branches, one on the dorsal, and the other on the ventral aspect of the duodenal portion of the intestine. This is encircled by two venous rings; into the middle or dorsal anastomosis the superior mesenteric vein opens. The portions of the veins above the upper ring become interrupted by the developing liver and broken up by it into a plexus of small capillary-like vessels termed sinusoids.

Derivatives

The vitelline veins give rise to:

Hepatic veins Inferior portion of Inferior vena cava Portal vein Superior mesenteric vein Inferior mesenteric vein The branches conveying the blood to the plexus are named the venae advehentes, and become the branches of the portal vein. The vessels draining the plexus into the sinus venosus are termed the venae revehentes, and form the future hepatic veins. Ultimately the left vena revehens no longer communicates directly with the sinus venosus, but opens into the right vena revehens. The persistent part of the upper venous ring, above the opening of the superior mesenteric vein, forms the trunk of the portal vein.

Function The vitelline veins drain the yolk sac during early embryonic development. They also drain the gut tube in embryos once this has formed from the yolk sac.

Additional images

References

External links Embryology at Temple Heart98/heart97a/sld020 cardev-009—Embryo Images at University of North Carolina cardev-016—Embryo Images at University of North Carolina

Illustrations

Worked examples

Example 1 — a first encounter with Vitelline veins

Start with the simplest possible case. Write down what Vitelline veins claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Vitelline veins before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Vitelline veins ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Vitelline veins

In research: Vitelline veins appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Vitelline veins in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Vitelline veins is common in secondary-school and first-year university syllabi. It links to neighbouring topics Embryology of cardiovascular system, so understanding it makes those chapters shorter.
In everyday life: Look for Vitelline veins outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Vitelline veins in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Vitelline veins means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Vitelline veins out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Vitelline veins in simple terms?

The vitelline veins are veins that drain blood from the yolk sac and the gut tube during gestation. Path They run upward at first in front, and subsequently on either side of the intestinal canal.

Why does Vitelline veins matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Vitelline veins?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Vitelline veins.